Deuteronomy 11:22 KJV
For if ye shall diligently keep all these commandments which I command you, to do them, to love the Lord your God, to walk in all his ways, and to cleave unto him;
Deuteronomy 11:22, King James Version
In context
21 That your days may be multiplied, and the days of your children, in the land which the Lord sware unto your fathers to give them, as the days of heaven upon the earth.
22 For if ye shall diligently keep all these commandments which I command you, to do them, to love the Lord your God, to walk in all his ways, and to cleave unto him;
23 Then will the Lord drive out all these nations from before you, and ye shall possess greater nations and mightier than yourselves.